Merge "Adds a repoducer for post_live_migration_at_destination failures"
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import nova
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from nova import test
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from nova.tests import fixtures as nova_fixtures
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from nova.tests.functional import fixtures as func_fixtures
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from nova.tests.functional import integrated_helpers
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import oslo_messaging as messaging
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from unittest import mock
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class PostLiveMigrationFail(
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test.TestCase, integrated_helpers.InstanceHelperMixin):
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"""Regression test for bug 2143972
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"""
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def setUp(self):
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super().setUp()
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self.useFixture(nova_fixtures.NeutronFixture(self))
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self.glance = self.useFixture(nova_fixtures.GlanceFixture(self))
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self.useFixture(func_fixtures.PlacementFixture())
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self.useFixture(nova_fixtures.HostNameWeigherFixture())
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self.start_service('conductor')
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self.start_service('scheduler')
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api_fixture = self.useFixture(nova_fixtures.OSAPIFixture(
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api_version='v2.1'))
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self.api = api_fixture.admin_api
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self.api.microversion = 'latest'
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self.src = self._start_compute(host='host1')
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self.dest = self._start_compute(host='host2')
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def test_post_live_migration_keystone_fails(self):
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"""Test for bug 2143972.
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This test simulate a service failure during post live migration.
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"""
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orig_function = nova.network.neutron.API.setup_networks_on_host
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service_exception = messaging.RemoteError(
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exc_type="Remote Error",
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value="ServiceUnavailable The server is currently "
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"unavailable.")
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self.count_call = 0
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# Fist setup_networks_on_host call is in the pre_live_migration method.
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# Second setup_networks_on_host call is in the post_live_migration
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# method.
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def fake_setup_networks_on_host(*args, **kwargs):
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"""Call the original function first and then raise an exception
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simulating keystone or neutron not available.
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"""
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self.count_call += 1
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if self.count_call > 1:
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raise service_exception
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return orig_function(*args, **kwargs)
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server = self._create_server(networks=[])
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self.assertEqual(self.src.host, server['OS-EXT-SRV-ATTR:host'])
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with mock.patch(
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'nova.network.neutron.API.setup_networks_on_host',
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side_effect=fake_setup_networks_on_host
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):
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# FIXME(Uggla) A failure with post_live_migration_at_destination
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# leave the instance in MIGRATING status and
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# migration_expected_state to completed because the exception
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# is not raised by the compute manager. This is mainly due to
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# the previous behavior that would not want to break, allowing a
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# migration cleanup. A recent patch allows better handling of post
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# migration errors, so we can now raise an exception in such cases.
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server = self._live_migrate(
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server, migration_expected_state='completed',
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server_expected_state='MIGRATING')
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self.assertEqual(self.src.host, server['OS-EXT-SRV-ATTR:host'])
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